Simplify: \(2x - 1 - \dfrac{3x}{x + 4}\)

Simplify: \(\dfrac{4}{x^2 + 5x + 6} + \dfrac{1}{x^2 + 2x - 3}\)

Simplify: \(\dfrac{a}{5} + \dfrac{3a}{2}\)

Simplify: \(\dfrac{3p}{2} + \dfrac{q}{p}\)

Simplify: \(\dfrac{2k}{3} + \dfrac{2 - k}{5}\)

Simplify: \(\dfrac{x - 2}{3} + \dfrac{x + 1}{4}\)

Simplify: \(\dfrac{3}{x} + \dfrac{4}{x + 1}\)

Simplify: \(\dfrac{3}{y} - \dfrac{2}{y - 2}\)

Simplify: \(\dfrac{2x + 3}{5} - \dfrac{x + 2}{3}\)

Simplify: \(\dfrac{2}{x - 1} - \dfrac{3}{x + 1}\)

\(\dfrac{3}{2x - 1} + \dfrac{5}{1 - 2x}\)